A light-year is the distance that light travels in a vacuum in one Julian year. It's a unit used to measure astronomical distances.

A yard is a unit of length commonly used in the imperial and U.S. customary systems. It is equal to 3 feet or 0.9144 meters.

Light-years measure enormous cosmic distances. 50,000 yards, while a significant distance on Earth, is infinitesimally small compared to the scale of space measured in light-years.

Generally, yards are not used for astronomical measurements due to the immense scale of space. Units like light-years, parsecs, and astronomical units are preferred.